Would this explode a tempered bottom? - The Planted Tank Forum
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 11-03-2011, 03:09 PM Thread Starter
Planted Tank Enthusiast
proaudio55's Avatar
PTrader: (0/0%)
Join Date: Oct 2011
Location: Blaine, Minnesota
Posts: 641
Question Would this explode a tempered bottom?

Has anyone tried to heat an aquarium via a sheet heater adhered to the outside of the glass? (Mcmaster-carr part number 35765K287)

Obviously that's only a heater and I'd need a separate heat controller / temperature probe.

So it's a 12" X 18" silicone sheet putting out 2.5 watts per square inch (for a total of 540w) . . . the question is, would a tempered bottom explode if you heated it up?

Oh, and I'm interested in doing this because:
#1 It makes for a less cluttered tank
#2 It will heat the gravel / plants' roots
#3 This provides more "even heat" without strong circulation
proaudio55 is offline  
Sponsored Links
post #2 of 6 (permalink) Old 11-03-2011, 04:45 PM
Children Boogie
mistergreen's Avatar
PTrader: (13/100%)
Join Date: Dec 2006
Location: Cincinnati
Posts: 16,743
The glass will explode but not unless the temp exceeds 300F+. I once accidentally left a glass lid on top of a stove ;eek;

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
mistergreen is offline  
post #3 of 6 (permalink) Old 11-03-2011, 04:58 PM
Planted Tank Guru
OverStocked's Avatar
PTrader: (76/94%)
Join Date: May 2007
Location: SoDak
Posts: 10,732
I busted the bottom of a turtle tank with a heat tape because that part of the turtle tank got dry. Some water leaked onto it and the temp change caused it to go BOOM.

However, I do not think that a constant heat on a damp surface would cause harm. It wouldn't be efficient, due to a large portion of the heat escaping OUT and away from the glass, and you'd be heating through glass and substrate, which would be much less efficient than heating water directly.

If your only goal is to remove the heater from the tank, and inline heater like hydor or lifeguard modules is what I would recommend.
OverStocked is offline  
post #4 of 6 (permalink) Old 11-04-2011, 04:26 PM
Planted Member
PTrader: (0/0%)
Join Date: Dec 2008
Location: Madison, WI
Posts: 151
Heating the plants roots was very in vogue years ago, but most people find it more trouble than it is worth, and it is not worth much...
Any circulation you have will move heat around enough. You don't need high flow with an in-line heater.

But all that stated, yes, it would work fine. Use some insulation below the mat-- either polystyrene or the mylar reflector plus foam wrap-- would help more heat get where you want it.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
tzen is offline  
post #5 of 6 (permalink) Old 11-04-2011, 06:44 PM
Wannabe Guru
PTrader: (0/0%)
Join Date: Aug 2010
Location: Wake Forest NC
Posts: 1,121
I'm still angry over the "cold root syndrome" crap that so much hulllaballoo was made about, back in the late 90's/early 2000's. I read every article and website I could find about it and nearly took the plunge with a DIY version, but never did.

Glad I didn't.

Now the final answer to this question regarding the tempered glass---- tempered glass is usually quite tough against heat. However it is NOT good with thermal expansion.

If this thing gets really warm, I suppose it could case the tempered to want to expand, and the silicone joints around (or on top of) it could give it pressure. I had a fireplace glass door explode once (in the summer, no fire at all, just a normal day) because the glass was tempered but siliconed in place and had nowhere to expand. The company that sold the fireplace had a recall on it, so they sent us new tempered doors where the glass was NOT glued in place, they were only "trapped" but had some wiggle to them. No more boom.

Try this at your own risk, I can't give you a definitive answer.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
redfishsc is offline  
post #6 of 6 (permalink) Old 11-05-2011, 02:10 AM
Planted Tank Obsessed
PTrader: (26/100%)
Join Date: Aug 2010
Location: Charlotte NC
Posts: 453
I used a heat tape type thing on a 55 for a snake once, never had a problem, used a rheostat to keep the glass 97 degrees, which through the substrate kept the warm side of the tank just right.
chrisnif is offline  

diy, gravel heater, sheet heater

Quick Reply

Register Now

In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome